28712875104 has 72 divisors (see below), whose sum is σ = 82153306872. Its totient is φ = 9512225280.

The previous prime is 28712875097. The next prime is 28712875111. The reversal of 28712875104 is 40157821782.

28712875104 is a `hidden beast` number, since 2 + 8 + 7 + 128 + 7 + 510 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (28712875097) and next prime (28712875111).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28712875104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258877 + ... + 352764.

It is an arithmetic number, because the mean of its divisors is an integer number (1141018151).

Almost surely, 2^28712875104 is an apocalyptic number.

28712875104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28712875104 is an abundant number, since it is smaller than the sum of its proper divisors (53440431768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28712875104 is a wasteful number, since it uses less digits than its factorization.

28712875104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611820 (or 611809 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The spelling of 28712875104 in words is "twenty-eight billion, seven hundred twelve million, eight hundred seventy-five thousand, one hundred four".